Its an inexpensive test that can save a dogs life. And it does not just test for sensitivity to ivermectin alone. It also tests for sensitivity to drug types for: antiparasitic agents, antaparasitic agents, antidiarrheal agents, tranquilizer, pre-anesthetic agents and chemotherapy agents
" . Dogs with the mutant gene can not pump some drugs out of the brain as a normal dog would, which may result in abnormal neurologic signs. The result may be an illness requiring an extended hospital stay--or even death."
If you have an aussie(only breed i really know) there is also a new test for the B12 absorbtion problem (sorry I know I screwed that up). although if you are past puppy hood, you don't need to worry. My girls are going to best tested asap. The Mdr-1 is great, easy to do. they can email or snail mail your results, it is only $60. and worth every penny.
I agree illusionminis. At least with the test having been done, breeders can pass the results to the buyer so that they can be aware of this gene , should their dog ever need surgery. Or before they give them something simple, like flea remedies, that could prove harmful or fatal.
If you are a dog and your owner suggests that you wear a sweater, suggest that he wear a tail.